JPH0530094Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to the structure of instruments in which a printed wiring board provided with a terminal board having a large number of terminals is housed in a housing so that it can be inserted and removed. .

[Conventional technology]

BACKGROUND ART Conventionally, as shown in FIG. 4, for example, a housing 1 of an electronic device or the like is provided with a terminal board 3 on the front surface for connection to another electronic device or the like. This terminal board 3
A printed wiring board 31 is connected to the back surface of the housing 1 via a flat cable or the like 30, and is housed in the housing 1 so as to be freely inserted and removed. And this terminal board 3
is removably attached to the front of the housing 1,
The upper and lower ends of the terminal board 3 are connected to the fixing holes 1c provided in the upper plate 1a and lower plate 1b of the housing by means of mounting screws 32.
is attached to.

By the way, in this mounting structure of the terminal board 3, the terminal board 3 is not moved by the rotation of the terminal screw 4 because the terminal screw 4 arranged on the front surface of the terminal board 3 is rotated to perform wiring work. It must be firmly fixed to the front of the housing to prevent it from turning and allow smooth work.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional technology, when a printed wiring board is mounted inside the casing 1 and attached to the rack 2, the center of the casing 1 is tilted due to the weight of the casing 1, as shown in FIG. It has the disadvantage that it bends downward (in the direction of arrow A) and touches the casings of other electronic devices in the lower row of the rack 2.

Furthermore, when repairing a printed wiring board housed in the housing, etc., there is a drawback that the removal of the terminal board is complicated because there are multiple mounting screws for one terminal board.

Therefore, in order to solve the above problems, this invention improves the strength so that the case does not bend when it is easily installed, makes it easier to attach the terminal board to the front of the case, and makes it easier to attach the terminal board to the front of the case. The purpose is to provide a structure for instruments that can be installed without rotation.

[Means for solving problems]

In order to solve the above-mentioned problem, this invention has a printed wiring board 15 which is inserted and removed freely from the front opening 7 between the upper plate 13 and the lower plate 12 in the outer casing 5 whose front side is the opening 7. In the structure of instruments in which a terminal board 9 is detachably provided on the front plate surface of the printed wiring board 15, the opening 7 of the outer casing 5 has an outer casing in contact with the opening 7. A U-shaped rail frame 11 is formed by integrally bending the front edge of the lower plate 12 (or upper plate 13) of 5 into a U-shaped cross section over its entire width, with the opening facing inside.
Further, the terminal board 9 has a protruding edge 16 at the front end of the printed wiring board 15 inserted into an engagement groove 20 formed in the vertical direction on the back surface thereof.
The jaw part 23 integrally protruding and fixed on the lower (or upper) edge facing the rail frame 11 is engaged in the rail frame 11, and the upper (or lower) part of the terminal plate 9 It is characterized in that it is fixed to the opposing part of the outer casing 5 by means of a fixing member 22 through a fixing hole 10 formed in the outer housing 5, and is engaged and fixed in a detachable manner.

[Effect]

By engaging the jaws provided at one end of the terminal board with the U-shaped rail frame provided on the casing, and fixing the other end of the terminal board to the casing with a fixing member such as a screw,
A terminal board is attached to the front of the housing.

Further, during this installation work, the terminal board is installed so that it does not rotate by engaging the engagement groove formed on the back surface of the terminal board with the protruding edge of the front end of the printed wiring board inside the housing.

〔Example〕

FIG. 1 is a perspective view of instruments showing an embodiment of the present invention, and FIG. 2 is a partially omitted exploded perspective view of the instruments.

This instrumentation constitutes a housing 5 for electronic equipment, etc., and has flanges 6 on both sides for attachment to a rack or the like (not shown). An opening 7 is formed in the front of the housing 5.
The upper edge 8 of the opening 7 is provided with a large number of fixing holes 10 at equal intervals to which the terminal plate 9 is attached.
Although FIG. 1 shows a state in which only one terminal plate 9 is attached, it is possible to attach as many terminal plates as there are fixing holes 10 provided in the housing 5.

Further, on the lower edge of the housing 5, as shown in FIG.
2 and is integrally formed. In the upper plate 13 and lower plate 12 of the housing 5, a plurality of parallel rail-shaped grooves 14 are formed in pairs, extending toward the back from the opening 7. These rail-shaped grooves 14 are designed to hold both upper and lower edges of the printed wiring board 15 in a removable manner when the printed wiring board 15 is placed vertically into the housing 5 through the opening 7. Furthermore, a pair of rectangular tongue-shaped protruding edges 16 are formed at the top and bottom of the front end of the printed wiring board 15.

Further, a flat cable 17 is provided on the back side of the terminal board 9. This flat cable 17 has a connector 18 attached to one end, and a connector 19 provided on the printed wiring board 15.
It is becoming connected to. Furthermore, engagement grooves 20 are formed at the upper and lower ends of the back surface of the terminal plate 9, respectively. This engagement groove 20 engages with each protruding edge 16 of the printed wiring board 15. Further, this engagement groove 20 also serves as a guide when attaching the terminal plate 9 to the housing 5.

On the other hand, a large number of terminal screws 21 are arranged on the front surface of the terminal board 9 so that it can be connected to other electronic devices.

A fixing member 22 is provided at the upper end of the terminal plate 9 and inserted from the front side. This fixing member 22 is made of a so-called push nut, etc., in which a plurality of claws provided on the outer circumference open radially and engage with the fixing hole 10 by pushing the central shaft body, and is a terminal plate. 9 is detachably attached to the housing 5. Note that, as such a fixing member, for example, a screw or the like may be used.

Furthermore, a jaw portion 23 is provided protruding from the lower edge of the terminal plate 9. The jaw portion 23 has a horizontal edge corresponding to the width of the terminal plate 9, and this horizontal edge fits into the rail frame 11.

In the above configuration, when attaching the terminal board 9 to the housing 5, first, the engaging groove 20 of the terminal board 9 is engaged with the protruding edge 16 of the printed wiring board 15,
At the same time, the jaw portion 23 is engaged with the rail frame 11, and the terminal plate 9 is attached to the front surface of the housing 5 by the fixing member 22 while the rotation of the terminal plate 9 is restricted.

[Effect of idea]

As explained above, according to the structure of the instruments according to the present invention, the front edge of the lower plate 12 (or upper plate) constituting the outer casing 5 is integrally bent to have a U-shaped cross section over its entire width. Since the lever-shaped rail frame 11 is used,
The housing 5 is reinforced in the width direction and has the effect that the intermediate portion in the width direction does not bend when it is easily attached.

Also, the jaw portion 23 that is integrally protruded and fixed to the lower (or upper) edge of the terminal plate 9 is inserted into and engaged with the rail frame 11, so that only the upper (or lower) portion of the terminal plate 9 is fixed. Since the terminal board 9 is fixedly attached to the outer case 5 using the fixing member 22, compared to the conventional structure in which the upper and lower ends are fixed to the outer case using screw fixing members, the terminal board 9
This has the effect of reducing the hassle of attaching and detaching.

Further, the protruding edge 1 at the front end of the printed wiring board 15 is inserted into the engagement groove 20 formed in the vertical direction on the back surface of the terminal board 9.
6 is inserted and fixed, the mounting position of the terminal part 9 can be accurately determined, and the terminal board 9 can be prevented from rotating relative to the printed wiring board 15 when connecting wires to the terminal board 9. It has excellent practical effects such as no problems.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the structure of instruments showing one embodiment of the present invention, Fig. 2 is a partially omitted exploded perspective view of the structure of instruments in the same embodiment, and Fig. 3 is the instrument structure in the same embodiment. 4 is a partially omitted exploded perspective view of a conventional case, and FIG. 5 is a partially omitted perspective view of the conventional case easily attached. 7... Opening, 9... Terminal board, 11... U-shaped rail frame, 12... Lower plate, 13... Upper plate, 15...
...Printed wiring board, 16...Protruding edge, 20...Engagement groove, 23...Jaw portion.

Claims (1)

[Scope of Claim for Utility Model Registration] A printed wiring board 15 is housed between an upper plate 13 and a lower plate 12 in an outer casing 5 whose front face is an opening 7, and can be freely inserted and removed from the front opening 7. In the structure of instruments in which a terminal board 9 is detachably provided on the front plate surface of the wiring board 15, the opening 7 of the outer casing 5 has a lower plate 12 ( Alternatively, a U-shaped rail frame 11 is formed by integrally bending the front edge of the upper plate 13) over its entire width into a U-shaped cross section, with the opening on the inside.
Further, the terminal board 9 has a protruding edge 16 at the front end of the printed wiring board 15 inserted into an engagement groove 20 formed in the vertical direction on the back surface thereof.
The jaw part 23 integrally protruding and fixed on the lower (or upper) edge facing the rail frame 11 is engaged in the rail frame 11, and the upper (or lower) part of the terminal plate 9 A structure of an instrument, characterized in that it is fixed to an opposing part of an outer casing 5 by a fixing member 22 through a fixing hole 10 formed in the holder, and is removably engaged and fixed.